Liquid ejecting apparatus

Abstract

When the drive frequency of the piezoelectric body at which the liquid is ejected is defined as a first drive frequency, the coercive voltage of the piezoelectric body obtained when the piezoelectric body is driven at the first drive frequency is defined as a first coercive voltage, a drive frequency lower than the first drive frequency is defined as a second drive frequency, and the coercive voltage of the piezoelectric body obtained when the piezoelectric body is driven at the second drive frequency is defined as a second coercive voltage, the difference between the reference voltage and the minimum value of the drive voltage is higher than the first coercive voltage and is lower than the second coercive voltage.

What is claimed is: 
     
         1 . A liquid ejecting apparatus comprising:
 a liquid ejecting head having a first electrode, a second electrode, and a piezoelectric body disposed between the first electrode and the second electrode; and   a voltage applying section that drives the piezoelectric body to eject a liquid by applying a reference voltage that does not change with time to the first electrode and applying a drive voltage that changes with time to the second electrode, wherein   when a drive frequency of the piezoelectric body at which the liquid is ejected is defined as a first drive frequency,   a coercive voltage of the piezoelectric body obtained when the piezoelectric body is driven at the first drive frequency is defined as a first coercive voltage,   a drive frequency lower than the first drive frequency is defined as a second drive frequency, and   a coercive voltage of the piezoelectric body obtained when the piezoelectric body is driven at the second drive frequency is defined as a second coercive voltage,   a difference between the reference voltage and a minimum value of the drive voltage is higher than the first coercive voltage and is lower than the second coercive voltage.   
     
     
         2 . The liquid ejecting apparatus according to  claim 1 , wherein
 the difference between the reference voltage and the minimum value of the drive voltage is closer to the first coercive voltage than to the second coercive voltage.   
     
     
         3 . The liquid ejecting apparatus according to  claim 1 , wherein
 the first drive frequency is higher than 1 [kHz].   
     
     
         4 . The liquid ejecting apparatus according to  claim 3 , wherein
 the first drive frequency is higher than 50 [kHz].   
     
     
         5 . The liquid ejecting apparatus according to  claim 3 , wherein
 the first drive frequency is higher than 80 [kHz].   
     
     
         6 . The liquid ejecting apparatus according to  claim 1 , wherein
 the second drive frequency is higher than 10 [Hz] and is lower than 100 [Hz].   
     
     
         7 . The liquid ejecting apparatus according to  claim 1 , wherein
 the second drive frequency is not the drive frequency at which the liquid is ejected.   
     
     
         8 . The liquid ejecting apparatus according to  claim 1 , wherein
 the liquid ejecting apparatus is configured to switch between a first mode in which the piezoelectric body is driven at the first drive frequency and a second mode in which the piezoelectric body is driven at the second drive frequency.